---

- name: Check if running on systemd
  stat: path=/sbin/init
  register: sbin_init
  changed_when: false
  check_mode: no

- name: Establish some role-related facts
  set_fact:
    mongodb_is_systemd: "{{ sbin_init.stat.islnk is defined and sbin_init.stat.islnk }}"
    mongodb_major_version: "{{ mongodb_version[0:3] }}"

- name: Disable transparent huge pages on systemd systems
  include_tasks: disable_transparent_hugepages.yml
  when:
    - mongodb_disable_transparent_hugepages
    - mongodb_is_systemd

- name: Add APT key
  apt_key:
    keyserver: "{{ mongodb_apt_keyserver }}"
    id: "{{ mongodb_apt_key_id[mongodb_major_version] }}"
  when: mongodb_package == 'mongodb-org'

- name: Fail when used wrong mongodb_version variable with Debian Stretch
  fail:
    msg: "mongodb_version variable should be '3.2' or '3.6' for Debian Stretch"
  when: (mongodb_package == 'mongodb-org' and
        (mongodb_version is not defined
         or mongodb_repository[mongodb_major_version] is not defined
         or mongodb_version != '3.6') and ansible_distribution_release == 'stretch')

- name: Fail when used wrong mongodb_version variable with Ubuntu 18.04
  fail:
    msg: "mongodb_version variable should be '3.6' and mongodb_package should be 'mongodb' for Ubuntu 18.04"
  when: ((mongodb_package == 'mongodb-org' or mongodb_version != '3.6')
         and ansible_distribution_release == "bionic")

- name: Fail when used wrong mongodb_version variable
  fail:
    msg: "mongodb_version variable should be '3.2', '3.4' or '3.6'"
  when: (mongodb_package == 'mongodb-org' and
        (mongodb_version is not defined
         or mongodb_repository[mongodb_major_version] is not defined))

- name: Add APT repository
  apt_repository: repo="{{ mongodb_repository[item] }}" update_cache=yes
  with_items: "{{ mongodb_major_version }}"
  when: mongodb_package == 'mongodb-org'

- name: Install MongoDB package
  apt: 
    name:
      - "{{mongodb_package}}"
      - numactl
    state: present

- name: Add systemd configuration if present
  copy: src=mongodb.service dest=/lib/systemd/system/mongodb.service owner=root group=root mode=0640
  when: mongodb_is_systemd

- name: Add symlink for systemd
  file: src=/lib/systemd/system/mongodb.service dest=/etc/systemd/system/multi-user.target.wants/mongodb.service state=link
  when: mongodb_is_systemd
  notify: reload systemd

- name: reload systemd
  shell: systemctl daemon-reload
  when: mongodb_is_systemd and mongodb_manage_service

- block:
   - meta: flush_handlers
  when: mongodb_is_systemd

- name: Install PyMongo package
  apt: pkg=python-pymongo state=latest
  when: not mongodb_pymongo_from_pip

- name: Install PIP
  apt:
    pkg:
      - python-dev
      - python-pip
  when: mongodb_pymongo_from_pip

- name: Install PyMongo from PIP
  pip:
    name: pymongo
    state: "{{ mongodb_pymongo_pip_version is defined | ternary('present', 'latest') }}"
    version: "{{ mongodb_pymongo_pip_version | default(omit) }}"
  when: mongodb_pymongo_from_pip